manifest: switch to vendor/omni

Change-Id: I32d7171459351ae19e2f5e55f5f66eece9e9b935
default: Use our own broadcom_libbt

Change-Id: I77e1900b0397e957e1b0dda5f0ca2fcd9533a35c
Merge "manifest: switch to vendor/omni" into android-4.3
Merge pull request #1 from omnirom/android-4.3

manifest: switch to vendor/omni